Angular 2+ Create ViewRef from Markup Injected into Dynamic Template

Question

I would like to create a ViewRef from markup that is dynamically inserted into a template. Is this possible based on the following code sample?

template.html

Answer 1

To create component dynamically inside <div id="forViewRef"></div> you can do the following:

Let's say we need to load the following component

@Component({
  selector: 'dynamic-comp',
  template: `
   <h2>Dynamic component</h2>
    <button (click)="counter = counter + 1">+</button> {{ counter }}
  `
})
export class DynamicComponent {
  counter = 1;
}

so first add it to declarations and entryComponents array of your @NgModule

  ...
  declarations: [ ..., DynamicComponent ],
  entryComponents: [ DynamicComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

after that create

template.html

<button (click)="createComponent()">Create component</button>

<div id="forViewRef"></div>

and finally write

component.ts

export class AppComponent {
  compRef: ComponentRef<DynamicComponent>;

  constructor(private injector: Injector,
              private resolver: ComponentFactoryResolver,
              private appRef: ApplicationRef) {}


  createComponent() {
    const compFactory = this.resolver.resolveComponentFactory(DynamicComponent);
    this.compRef = compFactory.create(this.injector, null, '#forViewRef');

    this.appRef.attachView(this.compRef.hostView);
  }

  ngOnDestroy() {
    if(this.compRef) {
      this.compRef.destroy();
    }
  }
}

I use appRef.attachView in order to include dynamic component to change detection cycle

Plunker Example

See also

• Display custom tag in google maps infowindow angular2

• Angular2 - Component into dynamicaly created element

• Add a component dynamically to a child element using a directive